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Physics : Recent Questions and Answers (Page 12)

Find answers to your questions about Physics or help others by answering their Physics questions.

How does the Magnetic field and Magnetic flux through a multiple-layered solenoid depend on the number of layers?

Will the Magnetic flux through the solenoid be equal to 0 if the number of layers is even ( due to opposite direction of current of the adjacent layers)?...

Asked on 12/15/2021

1 answer

Demonstration of comoving volume probed between 2 redshifts

1) I can't manage to find/justify the relation (1) below, from the common relation (2) of a volume. 2) It seems the variable r is actually the comoving distance and...

Asked on 12/15/2021

0 answer

Spinor Helicity Formalism: Reference Spinors $q$ in Compton Scattering

My question is rather straight forward, but the setup in order to pose the question is a little lengthy; please bear with me! I am trying to calculate the average...

Asked on 12/15/2021

0 answer

Are coherent states destroyed by measurements?

For a quantum harmonic oscillator in a coherent superposition, what happens if the energy is measured? Would it collapse to an energy eigenstate (a single excitation) corresponding to the result...

Asked on 12/15/2021

3 answer

Mixing Liquids of Certain Viscosity

I need a very small amount of 2 cSt liquid for an experiment I am doing, but I only have 5 cSt oil and water which has viscosity of 1...

Asked on 12/15/2021

0 answer

How come a photon cannot "give" partial energy while interacting with an electron fundamentally, as apposed to electron to electron interaction?

Particle Interactions: How come a photon cannot "give" partial energy while interacting with an electron fundamentally (with high probability) (as apposed to electron-electron interaction)? for example:An electron in an...

Asked on 12/15/2021

1 answer

Should negative pressure-thrust increase or decrease the nozzle-exit velocity of a rocket?

first post here. I've just started on George Sutton & Oscar Biblarz's Rocket Propulsion Elements and have stumbled upon contradictory solutions between the Eighth (PDF linked) and...

Asked on 12/15/2021

1 answer

Is it mathematically as well physically alright (consistent) to not quantize metric when doing QFT in curved spacetime?

I am not well-versed with the theory of renormalization of QFT as of now (I just know that when you redefine your observables you get rid of the UV divergences...

Asked on 12/15/2021

1 answer

Trying to intuitively understand Christoffel symbols

I recently watched Sean Carroll's YouTube series on "The Biggest Ideas in the Universe". In his Geometry and Topology video, he says that the connection in Riemannian geometry describes how...

Asked on 12/15/2021

1 answer

What equation can I use to calculate escape velocity as the radius increases from the Schwarzschild radius?

At the Schwarzschild radius, the escape velocity is the speed of light for all objects. However, I'm looking for an equation that will calculate the escape velocity as the radius...

Asked on 12/15/2021

1 answer

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